[Self-regulation of the pump function of the lymphangion]

The pump function was studied in single isolated lymphangions of the bovine mesenteric vessels 2.5-3.5 mm in diameter. The lymphangion was found to be able to self-regulate the pump function. The terminal diastolic pressure 0.5-1.0 kPa was found to be optimal for the pump function. The ratio of the lymphangion power to its weight is 0.2 Wt/N at the pressure 1 kPa. i.e. the lymphangion is near to the heart of warm-blooded animals by this parameter. Mainly the myocytes of circular layer contribute to the lymphangion pump function, the myocytes carrying out the function of stretch receptors enabling the lymphangion to alter its efficacy in accordance with the level of lymph production.